Doorstop mechanism



W. PEN FIELD DOORSTOP MECHANI SM May 29, 1934.

Filed June 2s, 1933 Patented May 29, 1934 UNITED4 STATES .PATENT OFFICE DOORSTOP MECHANISM WalkerPeneld, Ridley Park, Pa. Application ,lune 26, 1933, Serial VNo. 677,596

Claims. (Cl. 16-140) The principal objects of the present invention are to provide simple, reliable and sightly mechanism for stopping and rmly holding a door in any position, even in closed position, by release 5 of the door knob and for freeing the door for opening and closing movements by turning the knob; to provide that said mechanism shall also operate as a hinge and carry part of the weight of the door; to provide for putting said mechanism out of action so that the door may be operated in the usual manner; and, generally, to improve door stops of the kind indicated both in respect to construction and operation, and in respect to overcoming diiculties and defects in them.

Other objects of the invention will appear from the following description.

To these and other ends hereinafter stated or appearing, the invention, generally stated, comprises hinge members or plates, spring pressed friction clutch mechanism connected with the respective hinge members or plates, and clutch releasing mechanism actuated by the door latch or knob; with or without means for putting the clutch mechanism into and out of action in respect to the door knob or latch.

The invention also comprises the improvements to be presently described and finally claimed.

In the following description reference will be 3o made to the accompanying drawing forming part hereof and in which Figure 1 is an elevational view, partly in section, of a part of a door and its jamb illustrating features of the invention in application thereto.

Fig. 2 is a top or plan view of Fig. 1 showing both door jambs.

Fig. 3 is a view drawn to an enlarged scale and illustrating, partly in section and partly in elevation, features of invention.

Fig. 4 is a top or plan View of Fig. 3, and

Fig. 5 is an elevational view illustrating a modification.

Referring to the drawing it may be said that for the sake of clearness the device is shown as 45. fastened to the face of the jamb 'and door, as a strap hinge, but it may be applied to the abutting edges thereof, as a butt hinge, and in the drawing 1 and 2 indicate hinge members or plates. Interposed between the plates there is a spring pressed friction clutch mechanism. This mechanism, as illustrated in the drawing, comprises a pair of oppositely disposed hollow truncated cones 3 and 4 fast with the hinge plate 1, as by means of spaced webs 5. 'This clutch mechanism also comprises a pair of oppositely disposed hollow cones 6 and 7 mounted on the cones 3 and 4, and adapted to engage or bind and to clear and free the cones 3 and 4. 8 is a tension spring arranged in the hollow cones and connected at one end to the cone 7, by an adapter 9, and at the other end 30 to the cone 6, by an adjustable adapter 10. The cones 6 and 7 are connected with the hinge plate 2 for endwise, but not turning, movement by the notched fins or features 11, slidably engaging lugs or brackets 12 on the plate 2, Fig. 4. There 65 is a clutch releasing mechanism and as shown in the drawing it comprises a rod 13 having a fork with wedge shaped ends 14 which, acting on lugs 15 having beveled ends 16 and fast to the cones 6 and 7, overcome the spring 8 and clear the 70 cones.V The clutch releasing mechanism also comprises an eccentric 1'7 fast on the shank of the door knob or latch and operatively arranged within an eccentric strap on the end of the rod 13. The rod 13 is sho-wn as arranged to work in keepers 75 18 and to be spring pressed towards the left in Fig. 1 by a spring 19a, which, when present, cooperates with the spring of the door catch or knob and with such pull as the spring 8 may eX- ert through the wedge shaped surfaces 16 and 14. 80 The rod 13 is really a link and it may be rigid or flexible. This clutch release mechanism is shown as exposed for the sake of clearness, but it may be housed within the door, or within a suitable housing.

In use the door knob is turned, pulling the rod 13 towards the right, the wedges 14, press the cones 6 and 7 away from their normal engagement with the cones 3 and 4, and the door can be turned or swung into any position. When the door knob is released, the spring 8 returns the cones 6 and 7 to their normal position into frictional engagement with the cones 3 and 4, and the door is firmly held in such position against any movement, including banging or rattling.

The construction and mode of operation of the modification shown in Fig. 5 are as above described, except that the rod 13 is made in sections connected by the lost motion device 19, and the rod 13 is provided with'a collar that can bc 100 locked by the bolt 20 into position for causing the wedges 14 to hold the cones 6 and 7 clear of the i cones 3 and 4, thus the door knob can be turned in the usual way without aecting the friction clutch mechanism which is held out of action.

In the foregoing description and in the appended claims the word door is used in its broad meaning and includes the application of theinvention to thedoor element of easement windows.

Y It will be obvious to those skilled in the art to 110 which the invention relates that modifications may be made in details of construction and arrangement and matters of mere form without departing from the spirit of the invention which is not limited to such matters or otherwise than the prior art and the appended claims may require.

I claim:

1. Door stop mechanism comprising in combination a door latch, hinge plates, spring pressed spring arranged within the cones and normally pressing the cones into contact, a door latch, and a wedge rod actuated by the door latch and interposed between the cones to force them apart.

4. Door stop mechanism comprising in combination hollow confronting cones for connection respectively with the door and with its jamb, a spring normally pressing the cones into contact, a turnable door knob provided with an eccentric, and a Wedge rod provided with a circular loop cooperating with the eccentric.

5. Door stop mechanism comprising in combination a pair of hinge plates, hollow confronting cones of which one is connected with one plate, slot and feather connection between the other cone and the other plate, a spring arranged in the hollow cones and tending to press them into contact, a door knob, and mechanism actuated by turning movement of the knob and interposed between the cones for moving them in opposition to the spring.

WALKER PENFIELD. 

